Heater for use as either primary or auxiliary heat source and improvedcircuitry for controlling the heater
CA 1278809 C · Owner: Wallgren, Linus E. · Inventors: Wallgren, Linus E.; Olesen, Ole V.; Mason, Bobby L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heater unit and control circuitry therefor the heater, unit typically being employed as a preheater or primary heater for the installation and removal of electronic components from a PCB or the like and having various means for accommodating (a) an uneven surface or the presence of other components on the underside of the board or (b) an unlevel board. Moreover a, heater unit for sequentially providing preheat and primary heat from different zones of the heater is disclosed. A probe for use with the heater for sensing the temperature at various points on the board is also disclosed. The circuitry is characterized by ease of calibration of the heater temperature the temperature, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.